Postharvest changes in quality characteristics, antioxidant activity and bioactive compounds of peach and nectarine cultivars [Prunus persica (L.) Batsch]

Advances in Horticultural Science

M. Nuzzi¹  Marina Buccheri¹  M. Grassi¹  M. Terlizzi²  A. Sartori² 

[1] Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Unità di Ricerca per i Processi dell'Industria Agroalimentare, Via Venezian, 26, 20131 Milano;Consiglio per la Ricerca e la Sperimentazione in Agricultura, Centro di Ricerca per la Frutticoltura, Via di Fioranello, 52, 00134 Roma;

关键词: acidity;    carotenoids;    color;    DPPH;    firmness;    Folin-Ciocalteau;   

DOI  :  10.13128/ahs-22689

来源: DOAJ

【 摘 要 】

Three peach (‘Honora’, ‘Dr. Davis’ and ‘Fairtime’) and five nectarine (‘Maria Anna’, ‘Diamond Ray’, ‘Fairline’, ‘Nectaross’, ‘Sweet Red’) cultivars were analyzed at harvest and after a postharvest ripening period. Physicochemical characteristics [peel ground color (L*,C*, h°), soluble solids content (SSC), flesh firmness and titratable acidity (TA)], the concentration of some bioactive compounds [total phenol content (TPC) and total carotenoids (TC)] and the total antioxidant activity (TAA) were evaluated at harvest and after a shelf-life period of five days at 20 °C. Phenolic compounds and antioxidant activity were assayed on two different extracts of each sample: ethanol/HCl and ethanol/acetone. After shelf-life, all the cultivars showed a decrease in firmness and an increase in the ratio SSC/TA. The h° parameter of the peel background color had a good correlation with firmness, SSC, TA and the ratio SSC/TA in some of the cultivars, but no relationships were found in the white-fleshed varieties and in two of the nectarines evaluated. The trend of the carotenoids content after postharvest ripening was found to be cultivar-dependent, while TAA or TPC showed an increase in nectarines and remained unchanged in peaches. The ethanol/acetone mix was able to extract almost the double of antioxidant compounds with respect to the ethanol/HCl extract.

【 授权许可】

Unknown